Broke and fuzz remover for doctors



May 18, 1965 F. H. GoYET'rE BROKE AND FUZZ REMOVER FOR DOCTORS Filed Dec. 14, 1962 INVENTOR FRANCIS H. GOYETTE BY M ff?,

ATTORNEY United States Patent() 3,183,541 BRGKE AND FUZZ REMOVER FOR DOCTORS Francis Henry Goyette, Auburn, Mass., assignor to Lodding Engineering Corporation, Auburn, Mass., a corporation of Massachusetts Filed Dec. 14, 1962, Ser. No. 244,789

3 Claims. (Cl. 15-246) This invention relates to a new and improved continuous broke and fuzz removing attachment adapted to be Vapplied and in fact preferably mounted on the doctor back of a doctor blade and including the provision of continuously moving fingers which sweep over the surface of the doctor blade continuously and uni-directionally to sweep off any accumulation on the blade, particularly the fuzz usually deposited, and the broke in the case of disrupted webs or the like.

One of the objects of the invention is to provide such a device for application to already existing doctors if a fuzz or broke problem occurs.

The invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly set forth in the appended claims.

Reference is to be had to the accompanying drawings, in which FIG. 1 is a general plan view with parts broken away illustrating the device, omitting the hood, and

FIG. 2 is a section on line 2-2 of FIG. 1.

The reference numeral indicates a surface which is being scraped by the doctor blade 12. The doctor blade 12 may be mounted as usual in a conventional holder or the like 14 mounted also conventionally on a doctor back 16 mounted at its ends in journals or the like 18 as is well known in the art, in a position to apply the scraping edge of the blade 12 to the surface 10. During the scraping action, fuzz collects on the blade and also broke collects in the case of broken webs, the doctor blade clearing the Surface 10'.

Mounted in any convenient manner on the doctor back or by any other convenient structure on the machine frame, to fit over the holder 14, there is a bracket at 20 on which is mounted an electric motor or the like 22 driving a sprocket wheel or the like 24. This sprocket Wheel drives a sprocket chain 26 and at the opposite side of the machine there is another sprocket 28 around which the sprocket chain 26 is trained. There is also a convenient plate or the like 30 with its forward edge bent up about 90 to the plane of the plate forming a flange 311. This extends across the machine from side-to-side thereof appropriately mounting both sprocket wheels and supporting the chain. The flange 31 supports the lower rim of the chain maintaining it in a straight line parallel to the working edge of the doctor blade 12, and this lower chain run proceeds from right to left as the structure is disclosed in FIG. 1.

Also mounted on plate 30 or by any other convenient or desired means in an inverted channel iron or the like 32 which provides a side rail or fence 34 engaging the lower run of the chain opposite flange 31, and an opposite side rail or fence 36 against which the chain 26 is moved along the upper run. The channel 32 extends substantially from o-ne sprocket to the other.

Mounted at intervals on the sprocket chain 26 there is a series of pivoted fingers generally indicated by the reference numeral 38. As seen in FIG. l, each finger is L-Shaped, having a longer portion and a short portion 40, there being a pivot pin 42 at the junction of the two arms, secured to a selected roller or the like of the chain 26 so that the fingers 38 are moved with the chain.

Looking at FIG. 2, the fingers are seen to have a downturned nose portion 44 and this is preferably adapted to 3,183,541 Patented May 18, 1965 ICC ride along at approximately the junction of the blade 12 with the holder 14. These fingers clear the blades and scrape the fuzz collected or broke as the case may be, to a .depository indicated at 46 in FIG. 1, this depository being operable merely by gravity or by suction if such should be desired.

As the fingers 38 proceed to the left on the lower chain run as shown in FIG. l, they are maintained in right angular relationship with respect to the rail 34 by means of the short legs 40 which ride along the outside aspect of the rail 34. When the fingers ride olf the rail 34, then they merely dangle by gravity as is indicated by the reference numeral 48, it being understood that in general in the operation of the device it will be tilted somewhat with reference to the horizontal as is shown in FIG. 2. The reverse action takes place along the rail 36. As soon as the fingers ride onto rails 34 or 36 at the respective ends of the machine, they will be engaged by means of the short parts 40 of the fingers and are then held in the right angle position as shown, across the blade.

A light weight hood 50 can be applied to the device, being mounted on the back 16 and being preferably hinged as at 52. This hood extends across the operative part of the machine but is omitted from FIG. 1 for clarity of illustration. This hood prevents light fuzz from blowing over the machine, and the hinge allows the hood to be forced open in the event of a paper break. Otherwise, if the hood had no hinge, the brokeV would be apt to pile up under the hood and bend it out of shape. On wet broke the hood is not needed.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. A fuzz and broke remover for a doctor blade having a supporting doctor back comprising a driven member adjacent one end of the blade, an endless element arranged on an inclined plane and driven by the member along the blade, means for driving the driver member, a series of pivoted fingers arranged on axes substantially perpendicular to the plane of the endless element and spaced along the endless element, said fingers being closely adjacent to and in the area of the doctor blade so that they ride across the doctor blade unidirectionally from one end to the other to remove broke and fuzz from the blade, and means to receive the broke and fuzz adjacent the end thereof, each linger comprising a long portion and a shorter portion at right angles thereto, and including a guide rail, said guide rail extending between the sprockets and being engaged by the shorter portion of the finger maintaining the longer portion of the finger in right angular relationship with respect to the guide rail, the guide rail being parallel to the working edge of the doctor blade, and suction means for deposition of the broke and fuzz in the receiving means.

2. A fuzz and broke remover for a doctor blade having a supporting doctor back comprising an endless driven element arranged on an inclined plane, means driving said element, said endless driven element having a run extending substantially the length of said blade and adjacent and parallel to an edge thereof, a series of spaced fingers, means pivoting each finger to said element in spaced relation along the same and on axes substantially perpendicular to the said plane, the fingers traveling in close association to and across the blade from end-to-end thereof, and means maintaining said fingers generally at right angles to the run of the element aforesaid and at right angles to the edge of the blade, said last-named means comprising a part for each finger arranged at an angle with respect thereto, the finger being pivoted to said element at a point adjacent the junction of said part to the finger, said part generally trailing in the motion of said finger under influence of said element, and a guide rail extending substantially the length of the blade adjacent to said run of said element, said trailing part of said tinger engaging ySaid guide r-ail and maintaining the nger at a general right angle to the edge of the doctor blade.

3 A fuzz andbroke remover for a doctor blade having a supporting doctor backv comprising a driven rotary member adjacent one end of the blade, a rotary idler at the opposite end, an endless element engaged with said members and arranged along the blade, said element being arranged on an inclined plane, means for driving the driver member, a seriestof pivoted lingers on and spaced along the endless element, said ngers being on axes substantially perpendicular to said plane and riding across the doctor blade unidirectionally from one end to Vthe fuzz and broke, means to pivotally mount the hood on an axis spaced from the operative area of the lingers, broke being received in the hood above the fingers and tending to pivot the hood awayfrorn the fingers.

References Cited by the Examiner UNITED STATES PATENTS 789,628 5/05 Rhodes 198-229 `1,541,829 6/25 Durham 15-#25651 X 3,003,176 10/61 Goyette 15-725651 WALTER A, SCHEEL, Primm Examiner.

CHARLES A. VVILLMUTH,y Examiner. 

1. A FUZZ AND BROKE REMOVER FOR A DOCTOR BLADE HAVING A SUPPORTING DOCTOR BACK COMPRISING A DRIVEN MEMBER ADJACENT ONE END OF THE BLADE, AN ENDLESS ELEMENT ARRANGED ON AN INCLINED PLANE AND DRIVEN BY THE MEMBER ALONG THE BLADE, MEANS FOR DRIVING THE DRIVER MEMEBER, A SERIES OF PIVOTED FINGERS ARRANGED ON AXES SUBSTANTIALLY PERPENDICULAR TO THE PLANE OF THE ENDLESS ELEMENT AND SPACED ALONG THE ENDLESS, SAID FINGERS BEING CLOSELY ADJACENT TO AND IN THE AREA OF THE DOCTOR BLADE SO THAT THEY RIDE ACROSS THE DOCTOR BLADE UNIDIRECTIONALLY FROM ONE END TO THE OTHER TO REMOVE BROKE AND FUZZ FROM THE BLADE, AND MEANS TO RECEIVE THE BROKE AND FUZZ ADJACENT THE END THEREOF, EACH FINGER COMPRISING A LONG PORTION AND A SHORTER PORTION AT RIGHT ANGLES THERETO, AND INCLUDING A GUIDE RAIL, SAID GUIDE RAIL EXTENDING BETWEEN THE SPROCKETS AND BEING ENGAGED BY THE SHORTER PORTION OF THE FINGER MAINTAINING THE LONGER PORTION OF THE FINGER IN RIGHT ANGULAR RELATIONSHIP WITH RESPECT TO THE GUIDE RAIL, THE GUIDE RAIL BEING PARALLEL TO THE WORKING EDGE OF THE DOCTOR BLADE, AND SUCTION MEANS FOR DEPOSITION OF THE BROKE AND FUZZ IN THE RECEIVING MEANS. 